This article discusses the challenges researchers face in choosing suitable research models and methodologies. It explores the differences between qualitative and quantitative methods and their advantages and disadvantages. The article also delves into various qualitative methods such as case studies, ethnography, interaction analysis, action research, interviews, and content analysis. It emphasizes the importance of textbook content analysis in evaluating the efficiency of an English course. The research process and the justification of methodology and method choices are also discussed.